8.3 Labour Market Forces and Government Intervention

8.3 Labour Market Forces and Government Intervention – Full Revision Notes

8.3.1 Demand for Labour as a Derived Demand

• Labour is a derived demand, meaning it is not demanded for its own sake but because it contributes to the production of goods and services.

• Firms only demand labour if there is demand for the product or service the labour helps to produce.

• For example, if consumers demand more cars, firms will need to hire more workers to produce them.

8.3.2 Factors Affecting Demand for Labour

The demand for labour in a firm or occupation is influenced by:

• Productivity of labour: The more output a worker can produce per hour, the higher their marginal productivity, which increases demand.

• Price of the final product: Higher prices increase the firm’s revenue from each unit of output, increasing the marginal revenue product of labour.

• Cost of substitute factors: If capital (machinery) becomes cheaper than labour, firms may substitute capital for labour.

• Technology: Automation and advanced technologies may reduce demand for labour or increase demand for skilled workers.

• Availability of other resources: The presence or absence of complementary resources like raw materials can affect labour demand.

8.3.3 Movements Along and Shifts in the Demand Curve for Labour

• Movement along the curve: Caused by a change in the wage rate. For example, a fall in wages may lead to increased quantity of labour demanded.

• Shift of the demand curve: Caused by non-wage factors like changes in productivity, product demand, or technology. For example, a new production method might increase labour demand at every wage level.

8.3.4 Marginal Revenue Product (MRP) Theory

• Definition: The Marginal Revenue Product is the additional revenue a firm earns by employing one more unit of labour.

• Formula: MRP = Marginal Physical Product (MPP) × Price of Output

• Importance: The MRP curve is the firm’s demand curve for labour under perfect competition.

• Diminishing Returns: As more units of labour are hired, their marginal product tends to fall, making the MRP curve downward sloping.

• Firms will employ workers up to the point where MRP = wage rate.

8.3.5 Factors Affecting the Supply of Labour

The supply of labour to a firm or occupation depends on both wage and non-wage factors:

• Wage Factors:

• Higher wages attract more workers.

• The wage elasticity of supply varies between occupations (e.g., more elastic in low-skill jobs).

• Non-Wage Factors:

• Working conditions (e.g., safety, hours)

• Career progression and training opportunities

• Job satisfaction and status

• Fringe benefits (e.g., insurance, bonuses)

• Geographical and occupational mobility

• Social prestige and job security

8.3.6 Movements Along and Shifts in the Labour Supply Curve

• Movement along the supply curve: Occurs due to a change in wage rate.

• Shift of the supply curve: Influenced by non-wage factors such as:

• Education and training availability

• Migration and demographic changes

• Changes in alternative job opportunities

• Changes in taxes and benefits

• Preferences towards leisure or work

8.3.7 Wage Determination in Perfect Labour Markets

• In a perfectly competitive labour market, wages are determined by the intersection of labour demand and labour supply curves.

• Firms are wage takers: They hire workers at the prevailing market wage.

• Equilibrium occurs when the number of workers willing to work at a given wage equals the number firms want to hire.

8.3.8 Wage Determination in Imperfect Labour Markets

Several factors can influence wages away from the equilibrium level:

a) Role of Trade Unions

• Trade unions aim to increase wages and improve working conditions.

• Strong unions can raise wages above market equilibrium, potentially causing excess supply (unemployment).

• They may use collective bargaining or strikes.

b) Government Intervention: National Minimum Wage

• A minimum wage is the lowest legal wage an employer can pay.

• If set above the equilibrium, it can cause excess supply of labour (unemployment).

• It can also increase living standards and reduce wage exploitation.

c) Monopsony Employers

• A monopsony is a market where there is only one buyer of labour.

• They use their market power to pay lower wages and hire fewer workers than in competitive markets.

• Government or union intervention may raise both wages and employment.

8.3.9 Wage Differentials by Labour Market Forces

Wage differentials refer to differences in wages across jobs, occupations, or regions. Causes include:

• Differences in skill levels and training

• Risk and unpleasantness of work (dangerous or dirty jobs often pay more)

• Elasticity of labour supply

• Productivity differences

• Unionisation levels

• Market power of employers or employees

• Discrimination based on gender, race, etc.

• Regional differences in cost of living

8.3.10 Transfer Earnings and Economic Rent

Transfer Earnings:

• The minimum payment required to keep a worker in their current occupation or job.

• Equivalent to the opportunity cost of labour.

Economic Rent:

• The excess payment a worker receives above their transfer earnings.

• Occurs when the supply of labour is inelastic (e.g., unique talent or high skill).

Example:

• If a doctor earns $100,000, but would have stayed in the profession for $80,000, then:

• Transfer Earnings = $80,000

• Economic Rent = $20,000

Factors Affecting Economic Rent:

• Skill scarcity

• Limited occupational mobility

• High entry barriers to the job

• Inelastic labour supply